Top Alternatives to Nagios

Port Monitor is a comprehensive monitoring solution offering 24/7 uptime monitoring for websites and servers. It provides instant notifications on downtime, detailed reporting, and features like public status pages and SSL/domain expiration tracking. Available as a free service with options for on-premises deployment, it caters to both small projects and larger IT infrastructures.

Zabbix is a robust enterprise-class open-source solution for real-time monitoring of millions of metrics collected from tens of thousands of servers, virtual machines, and network devices. It provides a highly flexible and scalable platform for comprehensive IT infrastructure monitoring.

AppBeat is a comprehensive website and network monitoring service designed to alert users promptly about downtime or performance issues. It offers reliable uptime monitoring, performance measurement, and functional test capabilities, ensuring your online assets are always operational and responsive.

Spiceworks is a comprehensive, free IT management platform designed for small and medium-sized businesses. It offers a suite of tools for inventory, network monitoring, help desk, and community engagement.

Datadog is a leading cloud-scale monitoring and analytics platform that unifies data from across your infrastructure, applications, logs, and networks. It provides comprehensive visibility and actionable insights for DevOps teams, IT professionals, and business users alike.

NetCrunch is a powerful, single-server network monitoring platform designed for comprehensive visibility into your IT infrastructure. It provides robust and scalable network monitoring capabilities, including performance analysis, application monitoring, and automated network discovery, all managed from a Windows Server-based deployment for high efficiency.

Munin is a free and open-source networked resource monitoring tool designed to help users analyze resource trends and identify performance bottlenecks. It offers a simple yet powerful way to visualize the health of servers, applications, and network devices over time.

Total Network Inventory (TNI) provides comprehensive PC audit and software inventory management. It automatically scans your network without agents, gathering detailed information on hardware, software, and licenses for effective IT asset management and compliance across various operating systems.

Domotz is a comprehensive cloud-based network monitoring and management platform designed for IT professionals and MSPs. It provides real-time visibility, alerting, and remote access capabilities to manage and support networks and devices across various environments, from SMBs to large enterprises.

Pandora FMS offers comprehensive monitoring for networks, servers, applications, and cloud environments within an enterprise context. It provides a flexible and scalable platform for IT operations teams to ensure business continuity and optimize performance through detailed insights, alerts, and reporting.

PRTG Network Monitor is a comprehensive network monitoring solution that ensures the smooth operation of your IT infrastructure. It provides real-time monitoring of various aspects of your network, servers, and devices, helping to proactively identify and resolve issues before they impact your business.

HappyApps is a comprehensive online platform for monitoring the uptime and performance of your websites, servers, and cloud applications, offering robust alerting and detailed insights to ensure the reliability of your digital infrastructure.

Icinga is a powerful open-source monitoring system that helps organizations keep track of the health and performance of their IT infrastructure, including networks, servers, and applications.

CoScale is a performance monitoring platform designed for modern, complex environments like containers and microservices. It offers full-stack visibility from infrastructure to application, utilizing anomaly detection to proactively identify issues and optimize performance.

Observium is an auto-discovering network monitoring platform designed for low-maintenance operation. It offers comprehensive visibility into a wide range of network devices, operating systems, and applications through intuitive graphical interfaces and extensive platform support.

Monitis provides comprehensive all-in-one cloud-based monitoring for websites, servers, networks, applications, and custom metrics, ensuring high availability and optimal performance.

MindArray is a comprehensive network monitoring and management solution designed to provide real-time visibility, performance analytics, and automation capabilities для enterprises. It includes features for network, server, application, and cloud monitoring, along with key functionalities like Business Service Management (BSM) and Service Level Agreement (SLA) reporting.

Cacti is a comprehensive network graphing and monitoring solution built upon the power of RRDTool. It provides a flexible and scalable platform for collecting, storing, and visualizing time-series data, making it an essential tool for network administrators to gain insights into performance and identify potential issues.

Pulseway is a comprehensive real-time IT monitoring and management software solution designed for modern IT teams and MSPs, accessible from anywhere via mobile or web.

LibreNMS is a powerful and user-friendly open-source network monitoring system based on PHP and MySQL. It automates the discovery and monitoring of network devices, servers, and applications, providing comprehensive visibility into network health and performance.

The Dude is a free network monitoring and management application developed by MikroTik. It provides comprehensive network discovery, mapping, monitoring, and alerting functionalities for various devices and services. Designed for ease of use, it helps administrators visualize their network infrastructure and quickly identify issues.

Lansweeper Network Inventory is a comprehensive, agentless IT asset management and network discovery solution designed for Windows environments. It provides detailed inventory of all connected devices without requiring agent installations.

IT Asset Tool is a powerful yet free software designed for comprehensive IT asset management. It offers robust inventory, monitoring, and reporting capabilities for networked devices, assisting businesses in tracking hardware and software assets efficiently and maintaining network health.

Monit is an open-source utility for managing and monitoring Unix and Linux systems. It automatically monitors processes, files, directories, devices, and services, providing proactive recovery and alerts.

PHP Server Monitor is an open-source, self-hosted tool for monitoring server and website availability and performance. It provides essential monitoring features, including uptime checks, website status, and various service monitoring, all from a centralized web interface.